Sandy Hook Promise, which is a group dedicated to teaching others how to spot warning signs in potential shootings, has released other PSAs that have been just as powerful as this one. Last year, they posted a video seeming to showcase a budding relationship between two teens. At the end of the video, however, a student opens fire and the viewer is taken back to all the scenes where the shooter showed many signs of possible violence.

The Sandy Hook shooting took place Dec. 14, 2012 when a 20-year-old man opened fire at an elementary school and killed 20 children and six adults before turning the gun on himself.